multi-line cursor support

src/js/cursor.ts

@@ -24,6 +24,14 @@ function showCursor(e: any) {
     }
 
     requestAnimationFrame(() =>
-        cmdCursor.value = " ".repeat(cmdInput.selectionEnd) + cursor
+        cmdCursor.value = buildBlankCursorLine() + cursor
     )
 }
+
+function buildBlankCursorLine(): string {
+    let line = ""
+    for (const char of cmdInput.value.slice(0, cmdInput.selectionEnd)) {
+        line += char === "\n" ? char : " "
+    }
+    return line
+}

src/js/history.ts

@@ -1,7 +1,7 @@
 ////
 // Command input history storage and navigation.
 
-import { cmdInput } from "./dom.js"
+import { cmdInput, cmdLine } from "./dom.js"
 
 const history: string[] = ["one", "two", "three"]
 let idx = -1
@@ -25,6 +25,8 @@ export function resetHistory() {
 }
 
 function navigateHistory(e: KeyboardEvent) {
+  if (cmdLine.dataset.extended) return
+
   if (e.key === "ArrowUp" || (e.ctrlKey && e.key === "p")) {
     e.preventDefault()
     if (idx >= history.length - 1) return

src/js/input.ts

@@ -14,7 +14,7 @@ function inputHandler(event: KeyboardEvent) {
     if (target?.id !== cmdInput.id) return
 
     if (event.key === "Escape" || (event.ctrlKey && event.key === "c")) {
-        cmdInput.value = ""
+        clearInput()
         resetHistory()
     } else if (event.key === "Tab") {
         event.preventDefault()
@@ -31,5 +31,5 @@ function inputHandler(event: KeyboardEvent) {
 function clearInput() {
     cmdInput.value = ""
     cmdInput.rows = 1
-    cmdLine.dataset.extended = "false"
+    delete cmdLine.dataset.extended
 }